Thrombin Assessment on Nanostructured Label-Free Aptamer-Based Sensors: A Mapping Investigation via Surface-Enhanced Raman Spectroscopy

Figure 2

SERS mapping distribution of the thrombin-aptamer complex for the four investigated protein concentrations: (a) 87.3 nM; (b) 8.73 nM; (c) 0.873 nM; (d) 0.0873 nM.

(a)

(b)

(c)

(d)